Question:
I wanted to know if you think it’s a good idea to do aerobics on my off days. I want to gain weight so I don’t know if I should do that. If I do aerobic training, will that help me build muscle or hurt when the muscles need rest?
Answer:
Doing some light aerobic work such as walking or cycling is not going to hinder your muscle gain goals. Doing too much aerobic work or going too hard during your aerobic work will, in fact, hinder your muscle gain.
There are a few reasons for this. In order to gain muscle, you need to eat more calories than your body burns. If you do a lot of cardio work, you are burning a lot of calories that your body could be using to build muscle.
The other reason is that hard cardiovascular training can increase breakdown of the muscle tissue you already have without providing a reason for your body to build bigger muscles, as in weight training. By forcing your body to recover from hard cardiovascular training, you essentially decrease the available resources your body has for building extra muscle.
I would recommend doing 2 days a week of light aerobic work for about 20 to 30 minutes per session. Use this is as more of a cardio maintenance training rather than really trying to improve your fitness otherwise you may limit your muscle growth.
If you want to focus on improving your cardio, then you should focus most of your training on that goal. It is always easier to train towards just one goal rather than two goals.
And if increased cardiovascular capacity is a major goal, I highly recommend interval training as a very effective option. Instead of doing long, slow cardio training, you basically break it up into shorter, more intense bursts of activity.
This will also have the advantage of being more compatible with muscle-growth training. If you’ve seen the physique of a sprinter compared the physique of a long-distance runner, you’ll know what I’m talking about…the sprinter is much more muscular.
So bottom line, if your main goal is weight gain, minimize cardio activity.